If you aren't familiar with Sleepypod, you should be. All of their carriers are crash tested and if you go to their website there are testimonials from people who have been in crashes and their pets are safe due to the carriers. They also make two other versions (mom took Cupcake to Florida in an Air) along with crash tested harnesses for dogs.
We got a free mobile pet bed for a review (Chanel just asked that we get the new True Violet color - as you can see her wish was granted).
And if you catch you sister using your stuff, just climb in with her until she leaves.
**Disclosure: We received the Sleepypod® Mobile Pet Bed from Sleepypod in exchange for our honest review. All opinions are our own. Sleepypod is not responsible for the content of this post. Random Felines only shares products and information we feel will be of interest to our readers.